Dwight s



No. 622,077. Patented Mar. 28, I899. n. s. RICHARDSON.

GRATE BAR.

(Application filed Nov. 8, 1898.)

(No Model.)

UNiTnn I STATES PATENT Erica.

DWIGHT S. RICHARDSON, OF NE\V YORK, N. Y.

GRATE-BAR.

SPECIFICATION forming part of Letters Patent No. 622,077, dated March 28, 1899. Application filed November 8,1898. Serial No. 695,882. (No model.)

To ctZZ whom it may concern.-

Be it known that LDWIGHT S. RICHARDSON, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Grate-Bars; and I do hereby declare the following to be a full, clear, and exact description of the same,- reference .being had to the accompanying drawings,

forming a part of this specification, and to the letters of reference marked thereon.

This invention relates more especially to that class of grate-bars which are adapted to beassembled in a group or series and to be operated by connecting-gearing which imparts to all the members of the seriesa simultaneous reciprocating or rotary movement, although the specific invention here involved relates to the construction of each of the bars, and the advantages arising from the invention will be incident to the use of one or more bars and whether the same be operated independently or in connection with a series of bars. Grate-bars of this class are made angular in cross-sectionthat is to say, with a series of fuel-supporting faces and with end journals for supporting the bar arranged to take their bearing in a suitable frame or other supporting devices; and the special object of the present invention is to provide a means for more effectually clearing the grate of clinkers which might become wedged either between adjacent bars or between the side bars and the inclosing frame or fire-pot, and in accomplishing this end,'according to the present invention, the action of the edge uniting the f [rel-supporting faces upon the clinker is augmented by the addition of clinker-cutting projections located on each of the fuelsupporting faces adjacent to but slightly re moved from the edge or angle uniting the faces.

Referring to the accompanying drawings, Figure 1 is a top plan View of a simple form of grate with its inclosing and supporting frame and showing clinker-cutting projections. Fig. 2 is a cross-section through one of the grate-bars in its preferred form. Fig. 3 is a similar view showing a grate-bar with straight fuel-supporting faces and illustrating the application of my present invention thereto. Figs. 4, 5, 6, and 7 are detail views stove, and B B the grate-bars j ourn aled therein on end bearings 19, these grate-bars being preferably geared together atone end, as shown at O in dotted lines, and one of them at its opposite end is provided with an angular projection c for the application of an operating crank-handle or winch. These gratebars in cross-section intermediate the journals are preferably made triangular, as illus trated in Figs. 2 and 3, and in the most approved form each of the faces is concave, as illustrated in Fig. 2, although it will be understood that this feature is immaterial so far as the spirit of the present invention is concerned. The angles uniting the fuelbearing faces ordinarily perform a cutting function in freeing the grate from clinkers and like obstructions when such clinkers and obstructions become lodged either between the grate-bars themselves or between the side grate -bars and the sides of the inclosing frame; but experience has shown that such cutting action is imperfect, and as a result the grates are liable to become clogged with clinkers, and in order to overcome this action and secure a more perfect pulverization of the clinkers I now provide clinker cutting projections on each of the fuel-bearing faces of the bars, as indicated at D in Fig. 4 of the drawings, such projections being located adjacent to, but slightly removed from, the edges of the fuel-bearing faces, so as to act upon different portions of the clinkers from those being acted upon by the angular edges of the bar proper. These clinker-cutting projections in general arrangement follow closely along the edges of projections, the whole line of projections following the general line of the edge of the bar and in any instance being located, as before stated, a slight distance from the edge of the bar itself.

There the bars are provided with plain or substantially straightf uel-bearin g faces, as in Fig. 3, the projections will stand above such faces, although in the preferred construction the clinker-cutting projections are located within the hollow of the concave faces and project but slightly, if at all, above the concavity; but it will be understood that I do not wish to be limited in this respect, inasmuch as the invention is capable of general application to grate-bars which are angular in crosssection and adapted to be rotated about a central axial line. \Vith this arrangement it is found that the cliukers which work down between the adjacent grate-bars or between the side grate-bars and the inclosing frame are caught by the projections and so broken up, by a very easy movement of the operating handle or winch, as to pass through the grate with the greatest facility, thereby preventing any clogging up of the grate and insuring a free and unobstructed combustion-surface at the bottom of the fire-pot.

Having thus described my invention, what I claim as new is l. A grate-barhaving three fuel-supporting faces and end journals, each of said fuel-supporting faces having clinker-cutting projections adjacent the edges thereof in position to hold the clinkers so as to be acted on by the edges on the adjacent bar; substantially as described.

2. A grate-barangular in cross-scction and having end journals, with clinker cutting projections run ninglongitudinally along each face slightly removed from the angles uniting the faces and in position to hold the clinkers so as to be acted on by the edges on the adjacent bar; substantially as described.

D\VIGIIT S, RICHARDSON.

Witnesses:

THOMAS DURANT,

ALEXANDER S. STEUART. 

